dashboard don't show any information

==== Required information ====
- iRedMail version: PRO v2.1.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: CentOS 6.6
- Related log if you're reporting an issue: ?
====

Hi,

Dashboard is not showing any information about sent messages (see attach).

Thanks.